CN108362504B - Vehicle stability appraisal procedure and device - Google Patents
Vehicle stability appraisal procedure and device Download PDFInfo
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- CN108362504B CN108362504B CN201810017573.3A CN201810017573A CN108362504B CN 108362504 B CN108362504 B CN 108362504B CN 201810017573 A CN201810017573 A CN 201810017573A CN 108362504 B CN108362504 B CN 108362504B
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention discloses a kind of vehicle stability appraisal procedure and device.The vehicle stability appraisal procedure, comprising: obtain the acceleration signature value of the car owner obtained according to the acceleration signature value of vehicle travel；Obtain the speed change threshold value obtained according to the acceleration signature value of the car owner；Speed change score value is determined according to the acceleration signature value of the speed change threshold value and the car owner；Vehicle stability is assessed according to the speed change score value.Scheme provided by the invention can more comprehensively assess vehicle stability in conjunction with factors such as driver and vehicles.
Description
Technical field
The present invention relates to vehicle networking technical fields, and in particular to a kind of vehicle stability appraisal procedure and device.
Background technique
With the development of Internet of Things, the analysis application of car networking big data is further important for the effect of vehicle driving.No
With vehicle, stationarity when vehicle driving can have any different, and identical vehicle, and the stationarity that different people travels when driving also can be
Difference.An important indicator generally for vehicle stability assessment is the situation of change of travel speed, if velocity variations are big,
Vehicle drive fierceness is thought, if velocity variations are small, it is believed that vehicle drive is steady.
But to the main method of vehicle stability assessment still based on the absolute of vehicle acceleration in presently relevant technology
The size of numerical value is assessed, and can not reflect the influence that the factors such as people or vehicle generate vehicle stability well in this way.
Summary of the invention
It, can be in conjunction with driving in view of this, it is an object of the invention to propose a kind of vehicle stability appraisal procedure and device
The factors such as person and vehicle more comprehensively assess vehicle stability.
According to an aspect of the present invention, a kind of vehicle stability appraisal procedure is provided, comprising:
Obtain the acceleration signature value of the car owner obtained according to the acceleration signature value of vehicle travel；
Obtain the speed change threshold value obtained according to the acceleration signature value of the car owner；
Speed change score value is determined according to the acceleration signature value of the speed change threshold value and the car owner；
Vehicle stability is assessed according to the speed change score value.
Preferably, the speed change threshold value is to accelerate threshold value or deceleration threshold value；And the speed change score value is to accelerate score value or subtract
Fast score value.
It is preferably, described that vehicle stability is assessed according to speed change score value, comprising:
The speed change score value is bigger, judges that vehicle drive is fiercer；
The speed change score value is smaller, judges that vehicle drive is more steady.
Preferably, the acceleration signature value for obtaining the car owner obtained according to the acceleration signature value of vehicle travel, packet
It includes:
According to the time of vehicle travel and corresponding speed, stroke acceleration per second is determined；
In setting acceleration interval range, time that stroke acceleration per second occurs in each acceleration section is counted
Number, the acceleration signature value as vehicle travel；
Stroke acceleration per second is grouped in the number that each acceleration section occurs according to car owner ID and is summed；
Number that the stroke acceleration per second after grouping summation is occurred in each acceleration section and in the setting
The ratio of the total degree occurred in acceleration interval range, the acceleration signature value as car owner.
It is preferably, described to obtain the speed change threshold value obtained according to the acceleration signature value of the car owner, comprising:
The acceleration signature value of the car owner is normalized；
By the acceleration signature value of the car owner after normalized, ask equal respectively by car owner's quantity in each acceleration section
Value；
The acceleration signature value averaged is arranged by order of magnitude, and determine acceleration signature value accumulation and
Vector；
It determines as follows and accelerates threshold value:
Or,
Deceleration threshold value is determined as follows:
Wherein, accelerate_threshold is to accelerate threshold value, and decelerate_threshold is deceleration threshold value, t
For acceleration siding-to-siding block length, p is setting value, and m is the minimum value in the accumulative and vector being greater than the set value, and b is the corresponding acceleration of m
Characteristic value is spent, u is the upper limit value in acceleration section corresponding to m.
Preferably, the acceleration signature value according to the speed change threshold value and the car owner determines speed change score value, comprising:
It determines as follows and accelerates score value:
Or,
Deceleration score value is determined as follows:
Wherein, score_accelerate_id1 is the acceleration score value of car owner, and score_decelerate_id1 is car owner
Deceleration score value, t is acceleration siding-to-siding block length, and p is setting value, and m is the minimum value in the accumulative and vector being greater than the set value, b
For the corresponding acceleration signature value of m, n is the item number that minimum accumulative and vector arranges in the accumulation and vector, and a_id1 is institute
The acceleration signature value of car owner is stated, i is the item number of the acceleration signature value of the car owner.
According to another aspect of the present invention, a kind of vehicle stability assessment device is provided, comprising:
Acceleration signature value module, the acceleration for the car owner that the acceleration signature value for obtaining according to vehicle travel obtains
Characteristic value；
Speed change threshold module is worth for obtaining according to the acceleration signature of the car owner in the acceleration signature value module
The speed change threshold value arrived；
Speed change value module, for according in the speed change threshold module speed change threshold value and the acceleration signature value mould
The acceleration signature value of car owner in block determines speed change score value；
Stationarity evaluation module, the speed change score value for being determined according to the speed change value module assess vehicle stability.
Preferably, the acceleration signature value module includes:
Stroke acceleration submodule, for according to vehicle travel time and corresponding speed, determine stroke acceleration per second
Degree；
Stroke acceleration signature value submodule, for counting in setting acceleration interval range, the stroke is per second to be added
The number that speed occurs in each acceleration section, the acceleration signature value as vehicle travel；
Be grouped collects submodule, the number for occurring stroke acceleration per second in each acceleration section according to
Car owner ID grouping summation；
Car owner's acceleration signature value submodule, for the stroke acceleration per second after being grouped summation in each acceleration
The ratio of the number that section occurs and the total degree occurred in the setting acceleration interval range, the acceleration as car owner
Characteristic value.
Preferably, the speed change threshold module includes:
Submodule is normalized, is normalized for the acceleration signature value to the car owner；
Mean value submodule, for being pressed in each acceleration section by the acceleration signature value of the car owner after normalized
Car owner's quantity is averaged respectively；
Accumulative and vector submodule, the acceleration signature value for will average are arranged by order of magnitude, and really
Determine accumulation and the vector of acceleration signature value；
Accelerate threshold value submodule, accelerate threshold value for determining as follows:
Or,
Deceleration threshold value submodule, for determining deceleration threshold value as follows:
Wherein, accelerate_threshold is to accelerate threshold value, and decelerate_threshold is deceleration threshold value, t
For acceleration siding-to-siding block length, p is setting value, and m is the minimum value in the accumulative and vector being greater than the set value, and b is the corresponding acceleration of m
Characteristic value is spent, u is the upper limit value in acceleration section corresponding to m.
Preferably, the speed change value module includes:
Accelerate score value submodule, accelerate score value for determining as follows:
Or,
Deceleration score value submodule, for determining deceleration score value as follows:
Wherein, score_accelerate_id1 is the acceleration score value of car owner, and score_decelerate_id1 is car owner
Deceleration score value, t is acceleration siding-to-siding block length, and p is setting value, and m is the minimum value in the accumulative and vector being greater than the set value, b
For the corresponding acceleration signature value of m, n is the item number that minimum accumulative and vector arranges in the accumulation and vector, and a_id1 is institute
The acceleration signature value of car owner is stated, i is the item number of the acceleration signature value of the car owner.
It can be found that the technical solution of the embodiment of the present invention, obtain is worth according to the acceleration signature of vehicle travel respectively
To car owner acceleration signature value and the speed change threshold value that is obtained according to the acceleration signature value of the car owner, further according to the change
Fast threshold value and the acceleration signature value of the car owner determine speed change score value, and it is flat then can to assess vehicle according to the speed change score value
Stability.Above-mentioned evaluation process combines the acceleration signature value of vehicle travel and the acceleration signature value of car owner, and passes through correlation
Operation generates a speed change score value, vehicle stability is finally assessed using speed change score value, in this way relative to existing the relevant technologies
In the only method assessed using vehicle acceleration size, more can reflect the shadow that the factors such as people or vehicle generate vehicle stability
It rings, more can more comprehensively assess vehicle stability in conjunction with factors such as driver and vehicles.
Further, the speed change threshold value of the embodiment of the present invention can be acceleration threshold value or deceleration threshold value；And the change
Fast score value can be to accelerate score value or deceleration score value, so that vehicle stabilization can be evaluated in terms of acceleration and deceleration two respectively
Property.
Further, the embodiment of the present invention is to obtain according to the mode that speed change score value carries out vehicle stability assessment
Speed change score value it is bigger, judge that vehicle drive is fiercer, obtained speed change score value is smaller, judges that vehicle drive is more steady.
Further, the embodiment of the present invention can be determined respectively by related algorithm accelerates threshold value and deceleration threshold value, and, also
It can be determined respectively by related algorithm and accelerate score value and deceleration score value.
Detailed description of the invention
Disclosure illustrative embodiments are described in more detail in conjunction with the accompanying drawings, the disclosure above-mentioned and its
Its purpose, feature and advantage will be apparent, wherein in disclosure illustrative embodiments, identical reference label
Typically represent same parts.
Fig. 1 is a kind of schematic flow chart of vehicle stability appraisal procedure according to an embodiment of the invention；
Fig. 2 is a kind of another schematic flow of vehicle stability appraisal procedure according to an embodiment of the invention
Figure；
Fig. 3 is a kind of schematic block diagram of vehicle stability assessment device according to an embodiment of the invention；
Fig. 4 is a kind of another schematic block of vehicle stability assessment device according to an embodiment of the invention
Figure；
Fig. 5 is a kind of schematic block diagram of vehicle stability assessment equipment according to an embodiment of the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
Although showing the preferred embodiment of the disclosure in attached drawing, however, it is to be appreciated that may be realized in various forms
The disclosure is without that should be limited by the embodiments set forth herein.On the contrary, thesing embodiments are provided so that the disclosure more
Add thorough and complete, and the scope of the present disclosure can be completely communicated to those skilled in the art.
The present invention provides a kind of vehicle stability appraisal procedure, can more comprehensively assess vehicle in conjunction with factors such as driver and vehicles
Stationarity.
Below in conjunction with the technical solution of attached drawing the present invention is described in detail embodiment.
Fig. 1 is a kind of schematic flow chart of vehicle stability appraisal procedure according to an embodiment of the invention.It should
Method can be applied in vehicle stability assessment device.
Referring to Fig.1, which comprises
In a step 101, the acceleration signature value of the car owner obtained according to the acceleration signature value of vehicle travel is obtained.
Wherein it is possible to the acceleration signature value of vehicle travel first be determined, then according to the acceleration signature value of vehicle travel
Obtain the acceleration signature value of car owner.
In a step 102, the speed change threshold value obtained according to the acceleration signature value of the car owner is obtained.
Wherein, the speed change threshold value can be acceleration threshold value or deceleration threshold value.
In step 103, speed change score value is determined according to the acceleration signature value of the speed change threshold value and the car owner.
Wherein, the speed change score value can be acceleration score value or deceleration score value.
At step 104, vehicle stability is assessed according to the speed change score value.
Wherein, if the speed change score value is bigger, judge that vehicle drive is fiercer；If the speed change score value is smaller, sentence
Disconnected vehicle drive is more steady.
It can be found that the technical solution of the embodiment of the present invention, obtain is worth according to the acceleration signature of vehicle travel respectively
To car owner acceleration signature value and the speed change threshold value that is obtained according to the acceleration signature value of the car owner, further according to the change
Fast threshold value and the acceleration signature value of the car owner determine speed change score value, and it is flat then can to assess vehicle according to the speed change score value
Stability.Above-mentioned evaluation process combines the acceleration signature value of vehicle travel and the acceleration signature value of car owner, and passes through correlation
Operation generates a speed change score value, vehicle stability is finally assessed using speed change score value, in this way relative to existing the relevant technologies
In the only method assessed using vehicle acceleration size, more can reflect the shadow that the factors such as people or vehicle generate vehicle stability
It rings, more can more comprehensively assess vehicle stability in conjunction with factors such as driver and vehicles.
Fig. 2 is a kind of another schematic flow of vehicle stability appraisal procedure according to an embodiment of the invention
Figure.The present invention program is described in more detail relative to Fig. 1 in Fig. 2.This method can be applied in vehicle stability assessment device.
The scheme of the embodiment of the present invention, can be using the driving stationarity of car owner's totality as reference, and by vehicle row
The acceleration related data of journey is analyzed, to can reflect in conjunction with the factors assessments vehicle stability such as driver and vehicle
The severity that each car owner drives out.
Referring to Fig. 2, which comprises
In step 201, the acceleration signature value of vehicle travel is extracted.
In the step, may include:
1) according to the time of vehicle travel and corresponding speed, stroke acceleration per second is determined.
In the embodiment of the present invention, need using the run-length data for arriving vehicle, the dimension of run-length data may include vehicle
Main ID, stroke code name trip_number, speed and the corresponding timestamp of data etc..Data explanation may refer to such as the following table 1 institute
Show:
| Title | Description | Type | Definition |
| ID | Car owner's code name | string | Car owner's unique identification |
| trip_number | Stroke code name | bigint | Using the duration of ignition of stroke as stroke code name |
| speed | Speed | double | Unit: km/h |
| time_stamp | Time | bigint | Timestamp indicates the time of positioning |
Table 1
Wherein it is possible to calculate acceleration per second according to the time of run-length data and corresponding speed.Such as vehicle plus
Speed: acc1=(speed2-speed1)/(time2-time1)；Speed2 and speed1 is respectively time2 the and time1 moment
Corresponding speed.
2) in setting acceleration interval range, count what stroke acceleration per second occurred in each acceleration section
Number, the acceleration signature value as vehicle travel.
Wherein it is possible to acceleration interval range be arranged, such as setting acceleration interval range is from -3 to 3 but is not limited to
This；Each acceleration interval division value can be set, such as it is 0.1 that each acceleration interval division value, which is arranged, then is by every 0.1
One section.The acceleration interval range being provided with and each acceleration interval division value can be based on experience and experimental data
Etc. being configured, the present invention is simultaneously not limited.
Count the number that stroke acceleration per second occurs in each acceleration section, namely statistics stroke acceleration per second
The value of degree falls in the number in each section, the acceleration signature value as vehicle travel.
The data top-of-form wherein counted can be such that
| ID | trip_number | (-inf,-3] | (-3,-2.9] | … | (2.9,3] | (3,inf) |
In step 202, according to the acceleration signature value of vehicle travel and grouping operation, the acceleration signature of car owner is extracted
Value.
In the step, may include:
1) stroke acceleration per second is grouped in the number that each acceleration section occurs according to vehicle ID and is summed.
It is wherein grouped and sums according to car owner ID, be exactly grouped according to car owner ID, calculate different stroke (trip_
One ID multirow data (a stroke data line) can be aggregated into a data (one in this way by the sum of data number)
A mono- data of ID).
2) the stroke acceleration per second after grouping summation is set in the number that each acceleration section occurs with described
Determine the ratio of the total degree occurred in acceleration interval range, the acceleration signature value as car owner.
By the above process, it extracts and obtains the acceleration signature value of car owner.
In step 203, it is determined according to the acceleration signature value of car owner and accelerates threshold value or deceleration threshold value.
In the step, may include:
1) the acceleration signature value of the car owner is normalized.
The acceleration signature value that can choose the car owner in acceleration section, is normalized, so that each section
Characteristic value is combined into 1 (one data of a people at this time).The top-of-form of tables of data may refer to as follows:
| ID | trip_number | (0,0.1] | (0.1,0.2] | … | (2.9,3] | (3,inf) |
The acceleration signature value of car owner is the value in (- inf, inf) range, considers that acceleration, deceleration separate operation, then when accelerating
Interval range be (0, inf).
2) it by the acceleration signature value of the car owner after normalized, is asked respectively in each acceleration section by car owner's quantity
Mean value.
It can average respectively to each acceleration section, that is, by the acceleration signature of the car owner after normalized
Value, averages in each acceleration section by car owner's quantity respectively, then the polymerizable acceleration signature value for obtaining vehicle travel
It is distributed (data only have a line at this time).The top-of-form of tables of data may refer to as follows:
| (0,0.1] | (0.1,0.2] | … | (2.9,3] | (3,inf) |
Data in tables of data may refer to as follows for example:
Wherein count_acceleration02 indicate (0.2,0.3], it is other similar.
3) the acceleration signature value averaged is arranged by order of magnitude, and determines the accumulation of acceleration signature value
And vector.
The acceleration signature value averaged can be arranged by order of magnitude, calculate the accumulation of acceleration signature value
And vector.Wherein after data are arranged according to the absolute value of acceleration signature value, calculates accumulation and vector is exactly n-th
Value be preceding n of former data with.The data of accumulation and vector may refer to as follows for example:
Wherein count_acceleration02 indicate (0.2,0.3], it is other similar.
4) it determines respectively and accelerates threshold value or deceleration threshold value.
Because characteristic difference when accelerating and slowing down is bigger, add so being calculated separately according to the symbol of acceleration
Acceleration threshold value, deceleration threshold value when speed, deceleration.
It can wherein determine as follows and accelerate threshold value:
Similar calculating deceleration threshold value decelerate_threshold, wherein deceleration threshold can be determined as follows
Value:
Wherein, accelerate_threshold is to accelerate threshold value, and decelerate_threshold is deceleration threshold value, t
For acceleration siding-to-siding block length, p is setting value, and m is the minimum value in the accumulative and vector being greater than the set value, and b is the corresponding acceleration of m
Characteristic value is spent, u is the upper limit value in acceleration section corresponding to m.It should be noted that setting value can take 0.95 i.e. 95% but not
It is confined to this, other percentages such as 90% etc. can also be selected.When setting value is 0.95, m=0.9599, that is to say, that
M is the minimum value being greater than the set value in accumulative and vector.
In step 204, according to the determining acceleration score value of acceleration signature value for accelerating threshold value and car owner, or according to deceleration threshold
Value and the acceleration signature value of car owner determine deceleration score value.
Score is accelerated to accelerate score value wherein it is possible to determine as follows:
Similar, deceleration score i.e. deceleration score value can be calculated.Wherein it is possible to determine deceleration score value as follows:
Wherein, score_accelerate_id1 is the acceleration score value for the car owner that car owner ID is id1, score_
Decelerate_id1 is the deceleration score value of car owner, and t is acceleration siding-to-siding block length, and p is setting value, m be greater than the set value it is tired
Minimum value in meter and vector, b are the corresponding acceleration signature value of m, and n is minimum accumulative and vector in the accumulation and vector
The item number of arrangement, a_id1 are the acceleration signature value of the car owner, and i is the item number of the acceleration signature value of the car owner.Also
It is to say, the acceleration signature value for the car owner that car owner ID is id1 is vector a_id1, and i-th value of a_id1 is a_id1 [i], i
=1,2,3 ....
In step 205, vehicle stability is assessed according to acceleration score value or deceleration score value.
Wherein, the speed change score value is bigger, judges that vehicle drive is fiercer；The speed change score value is smaller, judges that vehicle is driven
It runs over steady.
For example, the value range of speed change score value is [0,1], score is higher, and it is fiercer to illustrate to drive.
It can be found that the embodiment of the present invention combines the acceleration signature value of vehicle travel and the acceleration signature of car owner
Value, using the driving stationarity of car owner's totality as reference, and is analyzed by the acceleration related data to vehicle travel, from
And the factors assessments vehicle stabilities such as driver and vehicle are combined, it can reflect out the severity that each car owner drives, relatively
In the existing method only assessed in the related technology using vehicle acceleration size, it more can reflect the factors such as people or vehicle to vehicle
The influence that stationarity generates more can more comprehensively assess vehicle stability in conjunction with factors such as driver and vehicles.The embodiment of the present invention
Scheme carries out vehicle stability assessment according to speed change score value, and obtained speed change score value is bigger, judges that vehicle drive is fiercer, obtains
Speed change score value it is smaller, judge that vehicle drive is more steady.
It should be noted that after with present invention method, by the driving severity for analyzing tens of thousands of a car owners
Score, it can be found that there is biggish difference between different car owners.In addition vehicle drive severity is grouped and carries out average calculating operation,
It also found that the driving of the maximum horsepower and vehicle of vehicle width, vehicle guide price, vehicle maximum speed and car engine swashs
Strong degree correlation is most strong, such as vehicle price is higher, accelerates score higher, deceleration score is higher；Vehicle maximum speed is bigger,
Accelerate score higher, deceleration score is higher；Vehicle maximum horsepower is bigger, accelerates score higher, deceleration score is higher；Vehicle width
It is wider, accelerate score higher, deceleration score is higher.
It is above-mentioned to describe a kind of vehicle stability appraisal procedure of the invention in detail, the corresponding vehicle of the present invention introduced below
Stationarity assesses device and equipment.
Fig. 3 is a kind of schematic block diagram of vehicle stability assessment device according to an embodiment of the invention.
Referring to Fig. 3, in a kind of vehicle stability assessment device 30, comprising: acceleration signature value module 31, speed change threshold value
Module 32, speed change value module 33, stationarity evaluation module 34.
Acceleration signature value module 31, the acceleration for the car owner that the acceleration signature value for obtaining according to vehicle travel obtains
Spend characteristic value.Wherein it is possible to the acceleration signature value of vehicle travel first be determined, then according to the acceleration signature value of vehicle travel
Obtain the acceleration signature value of car owner.
Speed change threshold module 32, for obtaining the acceleration signature according to the car owner in the acceleration signature value module 31
The speed change threshold value that value obtains.Wherein, the speed change threshold value can be acceleration threshold value or deceleration threshold value.
Speed change value module 33, for according to the speed change threshold value and the acceleration signature in the speed change threshold module 32
The acceleration signature value of car owner in value module determines speed change score value.Wherein, the speed change score value can be to accelerate score value or subtract
Fast score value.
Stationarity evaluation module 34, the speed change score value assessment vehicle for being determined according to the speed change value module 33 are steady
Property.Wherein, if the speed change score value is bigger, judge that vehicle drive is fiercer；If the speed change score value is smaller, vehicle is judged
It drives more steady.
Fig. 4 is a kind of another schematic block of vehicle stability assessment device according to an embodiment of the invention
Figure.
Referring to Fig. 4, in a kind of vehicle stability assessment device 40, comprising: acceleration signature value module 31, speed change threshold value
Module 32, speed change value module 33, stationarity evaluation module 34.
Acceleration signature value module 31, speed change threshold module 32, speed change value module 33, stationarity evaluation module 34 function
It can may refer to shown in Fig. 3.
Wherein, the acceleration signature value module 31 may include: stroke acceleration submodule 311, stroke acceleration spy
Value indicative submodule 312, grouping collects submodule 313, car owner's acceleration signature value submodule 314.
Stroke acceleration submodule 311, for according to vehicle travel time and corresponding speed, determine stroke it is per second plus
Speed.
Stroke acceleration signature value submodule 312, for it is per second to count the stroke in setting acceleration interval range
The number that acceleration occurs in each acceleration section, the acceleration signature value as vehicle travel.
It is grouped collects submodule 313, the number for occurring stroke acceleration per second in each acceleration section
It is grouped and sums according to car owner ID.
Car owner's acceleration signature value submodule 314, the stroke acceleration per second adds each after being used to be grouped summation
The ratio of the number that speed interval occurs and the total degree occurred in the setting acceleration interval range, as adding for car owner
Velocity characteristic value.
Wherein, the speed change threshold module 32 may include: normalization submodule 321, mean value submodule 322, it is accumulative and
Vector submodule 323 can also include accelerating threshold value submodule 324 or deceleration threshold value submodule 325.
Submodule 321 is normalized, is normalized for the acceleration signature value to the car owner.
Mean value submodule 322, for by the acceleration signature value of the car owner after normalized, in each acceleration section
It averages respectively by car owner's quantity.
Accumulative and vector submodule 323, the acceleration signature value for will average are arranged by order of magnitude, and
Determine accumulation and the vector of acceleration signature value.
Accelerate threshold value submodule 324, accelerate threshold value for determining as follows:
Deceleration threshold value submodule 325, for determining deceleration threshold value as follows:
Wherein, accelerate_threshold is to accelerate threshold value, and decelerate_threshold is deceleration threshold value, t
For acceleration siding-to-siding block length, p is setting value, and m is the minimum value in the accumulative and vector being greater than the set value, and b is the corresponding acceleration of m
Characteristic value is spent, u is the upper limit value in acceleration section corresponding to m.
Wherein, the speed change value module 33 may include: to accelerate score value submodule 331 or deceleration score value submodule 332.
Accelerate score value submodule 331, accelerate score value for determining as follows:
Deceleration score value submodule 332, for determining deceleration score value as follows:
Wherein, score_accelerate_id1 is the acceleration score value of car owner, and score_decelerate_id1 is car owner
Deceleration score value, t is acceleration siding-to-siding block length, and p is setting value, and m is the minimum value in the accumulative and vector being greater than the set value, b
For the corresponding acceleration signature value of m, n is the item number that minimum accumulative and vector arranges in the accumulation and vector, and a_id1 is institute
The acceleration signature value of car owner is stated, i is the item number of the acceleration signature value of the car owner.
Fig. 5 is a kind of schematic block diagram of vehicle stability assessment equipment according to an embodiment of the invention.
Referring to Fig. 5, in a kind of vehicle stability assessment equipment 50, comprising: processor 51, memory 52.
Processor 51 obtains the acceleration signature value of the car owner obtained according to the acceleration signature value of vehicle travel, obtains
It is special according to the acceleration of the speed change threshold value and the car owner according to the speed change threshold value that the acceleration signature value of the car owner obtains
Value indicative determines speed change score value；Vehicle stability is assessed according to the speed change score value.
Memory 52 stores the acceleration signature value of the vehicle travel.
The embodiment of the present invention also provides a kind of non-transitory machinable medium, is stored thereon with executable code,
When the executable code is executed by the processor of electronic equipment, the processor is made to execute method described below:
Obtain the acceleration signature value of the car owner obtained according to the acceleration signature value of vehicle travel；
Obtain the speed change threshold value obtained according to the acceleration signature value of the car owner；
Speed change score value is determined according to the acceleration signature value of the speed change threshold value and the car owner；
Vehicle stability is assessed according to the speed change score value.
In conclusion the technical solution of the embodiment of the present invention, obtain is worth according to the acceleration signature of vehicle travel respectively
To car owner acceleration signature value and the speed change threshold value that is obtained according to the acceleration signature value of the car owner, further according to the change
Fast threshold value and the acceleration signature value of the car owner determine speed change score value, and it is flat then can to assess vehicle according to the speed change score value
Stability.Above-mentioned evaluation process combines the acceleration signature value of vehicle travel and the acceleration signature value of car owner, and passes through correlation
Operation generates a speed change score value, vehicle stability is finally assessed using speed change score value, in this way relative to existing the relevant technologies
In the only method assessed using vehicle acceleration size, more can reflect the shadow that the factors such as people or vehicle generate vehicle stability
It rings, more can more comprehensively assess vehicle stability in conjunction with factors such as driver and vehicles.
Above it is described in detail according to the technique and scheme of the present invention by reference to attached drawing.
In addition, being also implemented as a kind of computer program or computer program product, the meter according to the method for the present invention
Calculation machine program or computer program product include the calculating for executing the above steps limited in the above method of the invention
Machine program code instruction.
Alternatively, the present invention can also be embodied as a kind of (or the computer-readable storage of non-transitory machinable medium
Medium or machine readable storage medium), it is stored thereon with executable code (or computer program or computer instruction code),
When the executable code (or computer program or computer instruction code) by electronic equipment (or calculate equipment, server
Deng) processor execute when, so that the processor is executed each step according to the above method of the present invention.
Those skilled in the art will also understand is that, various illustrative logical blocks, mould in conjunction with described in disclosure herein
Block, circuit and algorithm steps may be implemented as the combination of electronic hardware, computer software or both.
It should be understood by those ordinary skilled in the art that: the above is only a specific embodiment of the present invention, and
It is not used in the limitation present invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done,
It should be included within protection scope of the present invention.
Claims (7)
1. a kind of vehicle stability appraisal procedure characterized by comprising
Obtain the acceleration signature value of the car owner obtained according to the acceleration signature value of vehicle travel；
Obtain the speed change threshold value obtained according to the acceleration signature value of the car owner；
It is determined according to the speed change threshold value and the acceleration signature value of the car owner for judging that vehicle drive is fierce or it is flat to drive
Steady speed change score value；Vehicle stability is assessed according to the speed change score value；
Wherein, the speed change threshold value is to accelerate threshold value or deceleration threshold value；And the speed change score value is to accelerate score value or slow down to divide
Value；
Wherein, it determines as follows and accelerates score value:
Or,
Deceleration score value is determined as follows:
Wherein, score_accelerate_id1 is the acceleration score value of car owner, and score_decelerate_id1 is subtracting for car owner
Fast score value, accelerate_threshold are to accelerate threshold value, and decelerate_threshold is deceleration threshold value, and t is to accelerate
Siding-to-siding block length is spent, p is setting value, and m is the minimum value in the accumulative and vector being greater than the set value, and b is the corresponding acceleration signature of m
Value, n are the item number that minimum accumulative and vector arranges in the accumulation and vector, and a_id1 is the acceleration signature of the car owner
Value, i are the item number of the acceleration signature value of the car owner.
2. the method according to claim 1, wherein described assess vehicle stability according to speed change score value, comprising:
The speed change score value is bigger, judges that vehicle drive is fiercer；
The speed change score value is smaller, judges that vehicle drive is more steady.
3. the method according to claim 1, wherein described obtain is worth according to the acceleration signature of vehicle travel
The acceleration signature value of the car owner arrived, comprising:
According to the time of vehicle travel and corresponding speed, stroke acceleration per second is determined；
In setting acceleration interval range, the number that stroke acceleration per second occurs in each acceleration section is counted,
Acceleration signature value as vehicle travel；
Stroke acceleration per second is grouped in the number that each acceleration section occurs according to car owner ID and is summed；
The stroke acceleration per second after grouping summation is accelerated in the number that each acceleration section occurs in the setting
Spend the ratio of the total degree occurred in interval range, the acceleration signature value as car owner.
4. according to the method described in claim 3, it is characterized in that, described obtain is worth according to the acceleration signature of the car owner
The speed change threshold value arrived, comprising:
The acceleration signature value of the car owner is normalized；
By the acceleration signature value of the car owner after normalized, average respectively in each acceleration section by car owner's quantity；
The acceleration signature value averaged is arranged by order of magnitude, and determine acceleration signature value accumulation and to
Amount；
It determines as follows and accelerates threshold value:
Or,
Deceleration threshold value is determined as follows:
Wherein, accelerate_threshold is to accelerate threshold value, and decelerate_threshold is deceleration threshold value, and t is to add
Speed interval length, p are setting value, and m is the minimum value in the accumulative and vector being greater than the set value, and b is that the corresponding acceleration of m is special
Value indicative, u are the upper limit value in acceleration section corresponding to m.
5. a kind of vehicle stability assesses device characterized by comprising
Acceleration signature value module, the acceleration signature for the car owner that the acceleration signature value for obtaining according to vehicle travel obtains
Value；
Speed change threshold module is obtained for obtaining according to the acceleration signature value of the car owner in the acceleration signature value module
Speed change threshold value；
Speed change value module, for according in the speed change threshold value and the acceleration signature value module in the speed change threshold module
The acceleration signature value of car owner determine for judging that vehicle drive is fierce or driving stable speed change score value；
Stationarity evaluation module, the speed change score value for being determined according to the speed change value module assess vehicle stability；
Wherein, the speed change threshold value is to accelerate threshold value or deceleration threshold value；And the speed change score value is to accelerate score value or slow down to divide
Value；
Wherein, the speed change value module includes:
Accelerate score value submodule, accelerate score value for determining as follows:
Or,
Deceleration score value submodule, for determining deceleration score value as follows:
Wherein, score_accelerate_id1 is the acceleration score value of car owner, and score_decelerate_id1 is subtracting for car owner
Fast score value, accelerate_threshold are to accelerate threshold value, and decelerate_threshold is deceleration threshold value, and t is to accelerate
Siding-to-siding block length is spent, p is setting value, and m is the minimum value in the accumulative and vector being greater than the set value, and b is the corresponding acceleration signature of m
Value, n are the item number that minimum accumulative and vector arranges in the accumulation and vector, and a_id1 is the acceleration signature of the car owner
Value, i are the item number of the acceleration signature value of the car owner.
6. device according to claim 5, which is characterized in that the acceleration signature value module includes:
Stroke acceleration submodule, for according to vehicle travel time and corresponding speed, determine stroke acceleration per second；
Stroke acceleration signature value submodule, for counting stroke acceleration per second in setting acceleration interval range
Acceleration signature value in the number that each acceleration section occurs, as vehicle travel；
It is grouped collects submodule, the number for occurring stroke acceleration per second in each acceleration section is according to car owner
ID grouping summation；
Car owner's acceleration signature value submodule, for the stroke acceleration per second after being grouped summation in each acceleration section
The ratio of the number of appearance and the total degree occurred in the setting acceleration interval range, the acceleration signature as car owner
Value.
7. device according to claim 6, which is characterized in that the speed change threshold module includes:
Submodule is normalized, is normalized for the acceleration signature value to the car owner；
Mean value submodule, for pressing car owner in each acceleration section for the acceleration signature value of the car owner after normalized
Quantity is averaged respectively；
Accumulative and vector submodule, the acceleration signature value for will average are arranged by order of magnitude, and are determined and added
The accumulation of velocity characteristic value and vector；
Accelerate threshold value submodule, accelerate threshold value for determining as follows:
Or,
Deceleration threshold value submodule, for determining deceleration threshold value as follows:
Wherein, accelerate_threshold is to accelerate threshold value, and decelerate_threshold is deceleration threshold value, and t is to add
Speed interval length, p are setting value, and m is the minimum value in the accumulative and vector being greater than the set value, and b is that the corresponding acceleration of m is special
Value indicative, u are the upper limit value in acceleration section corresponding to m.
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